Add potion effect

So I was wondering (if) and how I could add a potion effect to a player for a time and if I can control the effect level like jumpboost I, jumpboost II

 

I don't believe you could add a new potion but you could add the effect to an already existing potion.
Using a playermoveevent checking if he moves up and if he is add some velocity.
I am sure you can figure out the exact details.

 

Use the addPotionEffect() method within any class implementing LivingEntity.

Usage:

Code:

Player p = event.getPlayer();
p.addPotionEffect(new PotionEffect(PotionEffectType type, int duration, int amplifier));

JavaDocs

 

TheLexoPlexx
Why are you reviving a post from 2 years ago?
int duration is the duration in ticks meaning 20 ticks in 1 second so if you want 5 seconds that would be 100 ticks